Hvad er cardinal? Hvad er cardinal? Of foremost importance; paramount: a cardinal rule; cardinal sins. Dark to deep or vivid red.Roman Catholic Church A high church official, ranking just below the pope, who has been appointed by a pope to membership in the College of Cardinals. A dark to deep or vivid red.A North American finch (Cardinalis cardinalis) having a crested head, a short thick bill, and bright red plumage in the male.A short hooded cloak, originally of scarlet cloth, worn by women in the 18th century.A cardinal number.